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*Pconst
Proportional ratio which causes the boiler to step up or down, faster or slower.
*WAIT
Wait as time controller hesitates before acting on a temperature change.
*Dconst
Derivative ratio speeds or slows boiler response compensating for overshoot and undershoot.
*Pconst is the proportional ratio
which causes the boiler to step up
or down, faster or slower (over-
shoot or undershoot) and finally
end up offset from desired tem-
perature. Default is 1/3.
*Dconst is the derivative ratio
which tells the system how first to
react to differing changes in water
temperature. Default is 3/1.
*Wait is the time controller waits
until it acts on a temperature
change. Default value is 5 sec-
onds.
Proportional Integral
Derivative Operator
Manual Action (PIDOMA) B.Proportional Integral Derivative
Operator Manual Action
BPconst W a i t Dcon s t
X/XXX/X
ALL BOILERS ON/OFF
Range 1 to 99. Default valve 20° F.
This Display Indicates:
The temperature above or below target at which the control will turn off or on all the boilers.
TARGET MIN/MAX AND HI LIM
Min Default 105, range 0 to 220°F Hi Lim shows the maximum obtainable water
Max Default 180, range 0 to 220°F temperature.
Hi Lim Default 200, range 0 to 220°F Hi Lim can not be lower than the target XXX/
Max.
Note: All of the values interact and are
depedent upon each other.
Al l Boi l er s on/ of f
XX above/ XX bel ow
Tar get Mi n/ Max: Hi Li m
XXX/ XXX XXX